A kind of shrimp and crab species farming farmland small lobster breeding density detection equipment

Abstract

The utility model discloses a kind of shrimp and crab seed raising farmland crawfish breeding density detection equipment, it is related to aquaculture technical field, including isolation net, its top end is equipped with mounting bracket;Shrimp cage, is located in the central position of the isolation net;Cage collecting component, it includes roller, is rotated on the mounting bracket by pivot, the outer periphery of the roller is equipped with the eccentric profile portion of radial protruding;The beneficial effects of the utility model are that: by the cooperation of the isolation net and shrimp cage of being set, the detection area can be demarcated in shrimp and crab seed raising farmland, and cooperate with the small crawfish in the detection area captured by shrimp cage, the effect of breeding density detection is realized;In addition, the eccentric structure of the roller on the cage collecting component being set makes the speed of pull rope cage collecting periodic alternation, drives shrimp cage to produce inertia shaking, can peel off cage wall attached small crawfish and moisture, improve the collection effect of subsequent small crawfish.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, specifically to a device for detecting the density of crayfish farming in farmland. Background Technology

[0002] In crayfish farming on farmland, accurate detection of stocking density is crucial for controlling the farming environment and ensuring the growth quality and yield of crayfish. Currently, the industry commonly uses a method of setting up isolation nets within a specific area of ​​the farming field and placing crayfish traps within the nets to detect density. By counting the number of crayfish caught in the traps and combining this with parameters such as the area covered by the isolation nets, the overall stocking density is estimated. This method is widely used in small and medium-scale farming scenarios due to its relative simplicity.

[0003] However, existing detection devices, which fix the shrimp traps in the center of the isolation net, have significant limitations. On the one hand, users need to enter the narrow space inside the isolation net to count the number of crayfish inside the traps, resulting in limited operating space and low efficiency. On the other hand, the shrimp traps are submerged in water for extended periods, requiring workers to continuously swing their arms to shake off the water adhering to the traps while pulling them up, which significantly increases the workload for the workers. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a device for detecting the stocking density of crayfish in farmland for shrimp and crab farming.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A device for detecting the stocking density of crayfish in farmland for shrimp and crab farming includes an isolation net with a mounting frame at the top;

[0007] Shrimp traps are placed at the center of the isolation net;

[0008] The cage-collecting assembly includes:

[0009] A roller is rotatably mounted on the mounting frame via a rotating shaft. The outer circumferential surface of the roller has a radially protruding eccentric profile. The distance from the outer edge of the eccentric profile to the rotation axis of the roller first increases linearly and then decreases linearly along the circumference of the roller.

[0010] The driving component is connected to the roller drive to drive the roller to rotate at a uniform speed;

[0011] A rope is wound around a roller, with its free end connected to a shrimp trap.

[0012] When the roller rotates to wind up the pull rope, the pull rope forms a first winding speed relative to the shrimp trap when it contacts the base circle of the roller surface, and a second winding speed greater than the first winding speed when it contacts the surface of the eccentric contour part. The pull rope is affected by the periodic alternation of the first winding speed and the second winding speed, which generates and transmits periodic inertial vibration to the shrimp trap.

[0013] Preferably, the base circle of the roller surface transitions smoothly with the outer wall of the eccentric contour portion.

[0014] Preferably, the mounting bracket is provided with a guide ring, the pull rope is threaded through the guide ring, and the guide ring is made of a wear-resistant material.

[0015] Preferably, the outer wall of the shrimp trap is provided with several shrimp inlet sleeves near the bottom, and the shrimp inlet sleeves are funnel-shaped.

[0016] Preferably, the shrimp trap has a conical bottom net at the bottom, and the bottom of the conical bottom net has several counterweights along the circumference and a rope-tying opening.

[0017] Preferably, the bottom of the isolation net is provided with a number of inserts for inserting into farmland soil along the circumferential direction.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: by using the isolation net and the shrimp trap together, a detection area can be delineated in the shrimp and crab farming field, and the shrimp trap can be used to capture crayfish in the detection area, thus achieving the effect of detecting the farming density; in addition, the eccentric structure of the roller on the trap assembly causes the rope to pull the trap at a periodic alternation speed, which drives the shrimp trap to generate inertial vibration, which can peel off the crayfish and water attached to the trap wall, improving the subsequent collection effect of crayfish. Attached Figure Description

[0019] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the roller in this utility model;

[0022] Figure 3 This is a schematic diagram of the shrimp trap structure in this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the isolation net in this utility model.

[0024] The following are the labels in the diagram: 1. Isolation net; 11. Mounting frame; 110. Guide ring; 12. Insert rod; 2. Shrimp trap; 201. Shrimp inlet sleeve; 202. Conical bottom net; 203. Counterweight; 3. Trapping assembly; 31. Roller; 311. Eccentric contour part; 32. Drive component; 33. Pull rope. Detailed Implementation

[0025] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0026] Example

[0027] like Figures 1-4 As shown, a crayfish farming density detection device for shrimp and crab farming includes an isolation net 1. The isolation net 1 can delineate a specific detection area in the shrimp and crab farming area, isolating the crayfish in this area from the crayfish in the external farmland environment, ensuring that subsequent detection is only for the crayfish in this specific area, thus guaranteeing the accuracy of the detection. The top of the net 1 is equipped with a mounting frame 11, which provides a stable mounting support structure for the rollers 31 in the cage-collecting assembly 3. The bottom of the isolation net 1 is provided with several inserts 12 along the circumference for inserting into the farmland soil, which provides a fixing function for the entire isolation net 1, preventing the isolation net 1 from shifting or tipping over in the farmland, and ensuring the overall stability of the equipment.

[0028] The shrimp trap 2 is located at the center of the isolation net 1. Several shrimp-entry sleeves 201 are installed on the outer wall of the shrimp trap 2 near the bottom. These sleeves are funnel-shaped, allowing crayfish in the farmland to easily enter the trap 2 through the large opening of the sleeves 201, but making it difficult for them to escape through the narrow opening, thus effectively capturing crayfish within the detection area. The bottom of the shrimp trap 2 has a conical bottom net 202 with several counterweights 203 arranged circumferentially on its bottom. These counterweights increase the overall weight of the trap 2, ensuring it sinks stably to the bottom after being placed in the farmland water. This prevents the trap from shaking or shifting due to water flow or crayfish entering the trap, ensuring it remains in the appropriate position within the detection area and improving capture efficiency. A rope-tying opening is located at the bottom of the conical bottom net 202 for easy access to remove the crayfish.

[0029] By using the isolation net 1 and the shrimp trap 2 together, a detection area can be defined in the shrimp and crab farming field, and the shrimp trap 2 can be used to capture crayfish in the detection area. The effect of detecting farming density can be achieved through multi-area and multi-sample detection.

[0030] Collection component 3 includes:

[0031] The roller 31 is rotatably mounted on the mounting frame 11 via a rotating shaft. The outer circumferential surface of the roller 31 has a radially protruding eccentric contour portion 311. The base circle of the roller 31 surface and the outer wall of the eccentric contour portion 311 transition smoothly, which avoids jamming or wear of the pull rope 33 due to abrupt changes in the contour during the winding process, thus extending the service life of the pull rope 33. The distance from the outer edge of the eccentric contour portion 311 to the rotation axis of the roller 31 first increases linearly and then decreases linearly along the circumference of the roller 31, which enables the winding speed of the pull rope 33 to achieve a stable periodic alternation, providing a stable power source for the inertial shaking of the shrimp trap 2.

[0032] The driving component 32 can be a geared motor, which is connected to the roller 31 to drive the roller 31 to rotate at a uniform speed. This ensures that the rotation speed of the roller 31 is not affected by external factors (such as changes in the force of manual operation), thus guaranteeing the consistency and stability of the pull rope 33's cage-retrieving speed. This, in turn, ensures that the frequency and amplitude of the periodic inertial shaking of the shrimp trap 2 remain stable.

[0033] The pull rope 33 is wound around the roller 31, and its free end is connected to the shrimp trap 2. The pull rope 33 is preferably made of nylon, which has high strength, wear resistance, water resistance, moderate elasticity, and outstanding UV resistance, making it suitable for aquatic environments.

[0034] The mounting frame 11 is equipped with a guide ring 110, through which the pull rope 33 is threaded. The guide ring 110 is made of wear-resistant material, preferably PEEK, which has excellent wear resistance to resist physical wear during long-term use and has a low coefficient of friction. This significantly reduces the contact friction resistance between the pull rope 33 and the inner wall of the guide ring 110 during threading, reducing wear and tear on the surface of the pull rope 33 caused by friction, thereby effectively extending the service life of the pull rope 33. It also makes the sliding operation of the pull rope 33 smoother and reduces the risk of jamming. At the same time, its guiding function ensures the stability of the pull rope 33 when it is wound up, preventing the shrimp trap 2 from tilting or shaking violently during the ascent due to the deviation of the pull rope 33, and ensuring that the shrimp trap 2 can rise steadily.

[0035] When the roller 31 rotates to retract the rope 33 to close the cage, the rope 33 contacts the base circle of the roller 31, forming a first closing speed relative to the shrimp cage 2. When the rope 33 contacts the radially protruding eccentric contour part 311 on the roller 31 (the distance from its outer edge to the rotation axis of the roller 31 gradually increases and then gradually decreases along the circumference), the effective radius of rotation increases, and the closing speed increases accordingly, forming a second closing speed that is faster than the first speed. As the roller 31 rotates once (the rotation period is determined by the rotation speed of the roller 31), the rope 33 will periodically alternate between the first and second closing speeds. This speed alternation causes the rope 33 to generate periodic inertial force and transmit it to the shrimp cage 2. When the speed increases, the cage body is subjected to a downward inertial force, and when the speed decreases, it is subjected to an upward inertial force, which in turn causes the shrimp cage 2 to periodically shake up and down. This shaking can shake off the crayfish and water attached to the cage wall and also sort out the shrimp swarms in the cage, making it easier to collect them later.

[0036] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A device for detecting the stocking density of crayfish in farmland for shrimp and crab farming, characterized in that, include: An isolation net (1) is provided with a mounting bracket (11) at its top. Shrimp trap (2) is placed at the center of the isolation net (1); The cage-collecting assembly (3) includes: The roller (31) is rotatably mounted on the mounting frame (11) via a rotating shaft. The outer circumferential surface of the roller (31) is provided with a radially protruding eccentric profile (311). The distance from the outer edge of the eccentric profile (311) to the rotation axis of the roller (31) first increases linearly and then decreases linearly along the circumference of the roller (31). The driving component (32) is connected to the roller (31) to drive the roller (31) to rotate at a constant speed; A pull rope (33) is wound around a roller (31), and its free end is connected to a shrimp trap (2); When the roller (31) rotates to wind up the pull rope (33), the pull rope (33) forms a first winding speed relative to the shrimp trap (2) when it contacts the base circle of the roller (31) surface. When the pull rope (33) contacts the surface of the eccentric contour part (311), it forms a second winding speed greater than the first winding speed. The pull rope (33) is affected by the periodic alternation of the first winding speed and the second winding speed, which generates and transmits periodic inertial vibration to the shrimp trap (2).

2. The shrimp and crab farming density detection device for crayfish in farmland according to claim 1, characterized in that: The base circle of the roller (31) transitions smoothly with the outer wall of the eccentric profile (311).

3. The shrimp and crab farming density detection device for crayfish in farmland according to claim 2, characterized in that: The mounting bracket (11) is provided with a guide ring (110), the pull rope (33) is threaded through the guide ring (110), and the guide ring (110) is made of wear-resistant material.

4. The shrimp and crab farming density detection device for crayfish in farmland according to claim 1, characterized in that: The outer wall of the shrimp trap (2) is provided with several shrimp inlet sleeves (201) near the bottom, and the shrimp inlet sleeves (201) are funnel-shaped.

5. The shrimp and crab farming density detection device for crayfish in farmland according to claim 1, characterized in that: The bottom of the shrimp trap (2) is provided with a conical bottom net (202), and the bottom of the conical bottom net (202) is provided with several counterweights (203) along the circumferential direction, and is provided with a rope-tying opening.

6. The shrimp and crab farming density detection device for crayfish in farmland according to claim 1, characterized in that: The bottom of the isolation net (1) is provided with several inserts (12) for inserting into farmland soil along the circumferential direction.

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